Conor Grant has become the latest name to be added to Ipswich Town's growing injury list ahead of the Tractor Boys' trip to Wolverhampton Wanderers on Tuesday night.
The 21-year-old striker, currently on loan to Town from Everton, picked up a groin injury during a training session on Monday and will miss out on the trip to Molineux.
"Didz (McGoldrick) has seen a specialist about his ankle and he doesn't need surgery, which is obviously a positive," McCarthy told the club's website. "It means he will be out for eight to 10 weeks rather than 10-14 weeks.
"Luke Hyam is also going to be out for a few weeks, maybe three or four. We all thought it was bone bruising and it is, but there is nerve damage as well and that is taking a while to heal.
"Brett Pitman is still out with a thigh problem and Conor Grant has come in from training with a tight groin. Both will miss the Wolves game so we are down to the bare bones a bit."
Ipswich defeated Barnsley in their opening game of the Championship season but fell to a 2-0 defeat at Brentford at the weekend, days after they exited the EFL Cup to League Two Stevenage in the first round.